19 results about "Shoulder surface" patented technology

To provide a pneumatic tire excellent in aerodynamic performance.SOLUTION: A pneumatic tire 1 includes a tread 10, a sidewall 2, and a shoulder 4, and has an angular ground contact end shape. Each of the shoulders 4 has a shoulder front surface 26 having substantially no corner, and the shoulder front surface 26 has a curved surface 26b having an arc shape curved so as to protrude outward in the tire axial direction. The curvature radius of the curved surface 26b is, for example, not less than 5mm and not more than 15mm.SELECTED DRAWING: Figure 8

Screw nut (1) with an internal thread and two nut parts (2, 3), wherein each of the nut parts (2, 3) has a section (4, 5) of the internal thread which can be slid onto an external thread (30) in a radial direction, and wherein the nut parts (2, 3) have interoperable connecting elements which allow a relative displacement of the nut parts (2, 3) in a direction radial to the axis of the internal thread to a position in use in which the internal thread of the screw nut (1) engages the external thread (30) with minimal play, wherein the connecting elements have guide surfaces (14 - 25) which guide the nut parts (2, 3) of the screw nut (1) in a rotational movement about an axis of rotation extending transversely to the axis of the internal thread when moving into the use position, wherein each nut part (2, 3) has at least one first locking arm (10, 13) which has a guide surface (14, 17) on one side which causes the rotational movement when the nut parts (2, 3) are moved and bears against a complementary guide surface (16, 15) on a second locking arm (12, 11) of the other nut part (3, 2), and wherein the screw nut (1) in the use position of the nut parts has a shoulder surface (26) extending towards the axis of the internal thread in the region of a first end of the internal thread, characterized by the fact that the shoulder surface (26) deviates from a plane extending radially to the axis of the internal thread and is such that the radially outer region of the shoulder surface (26) with the greatest distance to the axis of the internal thread has the greatest axial distance from the second end of the internal thread and the inner region of the shoulder surface (26) with the smallest distance to the axis of the internal thread has the smallest axial distance from the second end of the internal thread.

A fluid pressure cylinder (100) is provided with a cylinder tube (10). The cylinder tube (10) has: an annular connection part (13); a welded part (14) formed between the main body part (12) and the connecting part (13), the outer peripheral surface of the connecting part (13) having: a first curved surface (13b) formed so that the diameter increases as the distance from the welded part increases; a second curved surface (13c) which is formed on the end surface (11) side of the first curved surface (13b), and which is formed so that the diameter increases as the second curved surface approaches the end surface (11); a shoulder surface (13e) formed so as to be continuous with an end surface on the end surface (11) side of the second curved surface (13c), the shoulder surface (13e) extending radially outward; a large-diameter section (13f) formed so as to be continuous with the end surface (11); and an inclined surface (13g) formed so as to straddle between the large-diameter section (13f) and the shoulder surface (13e), the radius of curvature of the first curved surface (13b) being larger than the radius of curvature of the second curved surface (13c).

The invention belongs to the technical field of tire detection, and discloses a tire part visual defect detection device and a detection method thereof.The detection device comprises a rack, and a first CCD visual detection camera used for detecting the side wall of a tire and a second CCD visual detection camera used for detecting the crown of the tire are installed on the rack; a double-layer shelf is fixedly installed in the machine frame, a rotary table used for bearing a tire is installed at the top end of the double-layer shelf, and a tire centering and rotating integrated assembly used for enabling the tire and the rotary table to be kept coaxial and driving the tire to rotate is arranged in the double-layer shelf. Tire pressing assemblies used for applying vertical loads to tires are arranged on the left side and the right side in the machine frame, a longitudinal beam is fixedly installed on the top of the machine frame, and a tire shoulder warping assembly and an angle-adjustable visual detection assembly are installed at the bottom end and the outer wall of one side of the longitudinal beam respectively. The tire side wall, the outer tire crown, the inner tire surface and the inner tire shoulder surface of the tire can be synchronously detected.

The application provides a coupling for a pump, comprising a driving flange, a driven flange, and a plurality of sets of stepped shoulder nesting structures arranged between the driving flange and the driven flange; the stepped shoulder nesting structure comprises a groove and a convex shaft; the groove adopts a structure with a gradually reduced inner diameter to form a shoulder surface; an outer bag is arranged in the groove, and the outer bag is filled with a solidifiable fluid; the convex shaft can be inserted into the groove, abut against the shoulder surface, and press the outer bag; a reserved cavity is formed on the outer end surface of the convex shaft, and a probe is slidably inserted into the reserved cavity; the probe can pierce the outer bag to make the fluid overflow and solidify, forming a filler filling the space between the outer end surface of the convex shaft and the groove bottom. The coupling for the pump provided by the application can change the curved contact between the outer edge of the convex shaft and the shoulder surface into the surface contact between the outer end surface of the convex shaft and the filler, thereby expanding the contact area, reducing the wear phenomenon of the shoulder surface, and improving the structural stability in the continuous use scenario of the pump body.

The application discloses a stepped shaft shoulder punching equipment, which comprises two top plates and a side plate. A fixed cross and a movable cross are arranged between the two top plates. The fixed cross is fixedly connected with the side plate. The movable cross is located between the fixed cross and the shoulder surface of the stepped shaft to be machined and is movably connected with the side plate. A pressing device is installed between the fixed cross and the movable cross. The pressing device is used for driving the movable cross to axially move along the side plate and gradually approach the shoulder surface. An axially extending drill bit is installed on the plate surface of the movable cross towards the shoulder surface. The top end of the drill bit is hingedly connected with the movable cross. The end of the drill bit is tightly pressed against the shoulder surface. A driving device is installed on the fixed cross. The driving device drives the drill bit to rotate through a transmission device. The driving device and the drill bit are radially staggered, so that the drill bit can approach the central shaft and interference between the driving device and the central shaft is avoided. The drill bit can directly drill on the shoulder surface, work efficiency is improved, and machining precision is improved.

A static sealing device for a wheel hub assembly of a vehicle,. The wheel hub assembly includes a rolling bearing and a constant velocity joint, the rolling bearing having a radially outer ring, a radially inner ring, and an insert ring mounted on the radially inner ring and including an annular shoulder surface. The static sealing device includes a foam annular gasket formed directly in place on the annular shoulder surface such that it is integrally fixed to the annular shoulder surface, and a tubular element straddling the insert ring and the constant velocity joint and having a first end in direct contact with the foam annular gasket. Also a rolling bearing including the static sealing device.

The invention discloses a transmission shaft water cap double-shoulder taper threaded connector. A transmission shaft is in threaded connection with a water cap, a connecting thread of the transmission shaft and the water cap is a buttress taper thread, and a guide surface angle beta of the buttress taper thread is larger than a bearing surface angle alpha; the buttress taper threads are interference fit threads; the buttress taper thread connection adopts a double-shoulder structure of a main shoulder surface and an auxiliary shoulder surface, and the main shoulder surface and the auxiliary shoulder surface both adopt a sealing structure in which a boss is matched with a groove; the main shoulder face is perpendicular to the axis of the buttress taper thread, and an included angle is formed between the auxiliary shoulder face and the cross section of the buttress taper thread. The transmission shaft has the beneficial effects that the structural design is reasonable, and the transmission shaft adopts the inclined ladder double-shoulder high-bending-resistance special screwed joint, so that the transmission shaft has higher torsional strength and bending strength; the contact area of the special-shaped shoulders is increased, and the friction torque between threaded surfaces is reduced; due to the roundabout path of the special-shaped shoulder, the sealing performance of the conical surface seal is improved; and the service life of the transmission shaft under large torque is prolonged.

The invention discloses a threaded joint screwing method based on finite elements, which comprises the following steps of: establishing pre-processing files of three parts of threads, sealing surfaces and shoulder surfaces which are different in size and deviation combination, are respectively positioned on an internal threaded joint and an external threaded joint and are matched with each other in batches through a program, submitting finite element calculation in batches, and obtaining post-processing data in batches; and drawing a plurality of screwing curve graphs of different sizes and deviation combinations according to the screwing-in angle and the torque data point calculated according to the post-processing data, respectively obtaining the inflection point torque and the screwing yield torque on each screwing curve graph according to the plurality of screwing curve graphs, and finally synthesizing the torque results of each curve to recommend the optimal screwing torque. According to the Abaqus-based batch finite element pre-treatment and post-treatment method, batch finite element analysis can be performed on various specifications, deviation and load combinations in the research and development stage, or batch finite element evaluation can be performed on the measurement size of a product, so that the performance of the oil casing screwed joint can be comprehensively known.

A sealing device (5) for a rolling bearing (1) includes an annular support (8) and an elastomeric element (9) integral with the annular support. A radially outer edge (10) of the elastomeric element mates with an outer ring (2). A radially inner edge (11) of the elastomeric element mates with a shoulder surface (15) of an annular sealing seat (13) of the inner ring (3). An annular sealing lip (20) shaped substantially in the form of a sleeve axially protrudes only from a front face (21) directed towards the inside of the bearing (1) of a flange-shaped radial arm (16). The radial arm radially protrudes with respect to the annular support (8) from a root portion (22) of the radially inner edge. The elastomeric element has an axial overhang (24) which protrudes from the front face along an axial extension approximately equal to that of the annular sealing lip.

The utility model discloses a kind of earth road shoulder leveling devices, it is related to earth road shoulder leveling equipment technical field, including scraping flat plate group, the scraping flat plate group is installed on connecting frame, the connecting frame is installed on the mechanical arm of walking machine, the lower edge of the scraping flat plate group is used to scrape flat earth road shoulder surface, one side of the scraping flat plate group is equipped with first calibration support, first calibration rod is connected on the first calibration support, the first calibration rod can be moved up and down on the first calibration support, the lower end of the first calibration rod can be contacted with road surface. The utility model is contacted with road surface by first calibration rod, so that the height of scraping plate group can be calibrated, so that it can be scraped flat along the expected height to the earth material on earth road shoulder surface.

The invention belongs to the technical field of drill rod threads, and particularly relates to a drill rod thread capable of improving bearing capacity distribution in the thread tooth generatrix direction and a drill rod thereof.The drill rod thread comprises an external thread connector and an internal thread connector, and the external thread connector comprises an external thread connector body; one end of the external thread joint main body is connected with a drill rod, and the other end of the external thread joint main body is sequentially provided with an external thread joint main shoulder surface, an external thread joint taper pipe thread and an external thread joint auxiliary shoulder surface which are matched with the internal thread joint; and a main shoulder root groove is formed between the main shoulder surface of the external thread joint and the taper pipe thread of the external thread joint. The circular bead structure is changed into the main shoulder root groove, and the maximum stress value point of the external thread is transferred to the main shoulder root from the first ring tooth root at the thread connection part, so that the stress value of the main shoulder side root of the external thread can be effectively reduced, the stress concentration is reduced, and the service life of the thread tooth is prolonged.

This application discloses a telescopic towel rack, relating to the field of storage rack technology. It includes a hollow fixed hanging rod, two mounting bases, and one or two extension hanging rods. The end of the fixed hanging rod is connected by an insertion fit with a stepped hole on the corresponding mounting base. The extension hanging rod is slidably installed inside the fixed hanging rod and extends through the corresponding mounting base. The extension hanging rod includes an extension hanging rod body with a two-stage stepped shaft structure. A shoulder surface is formed at the diameter change of the extension hanging rod body. The large-diameter end of the extension hanging rod body slides into the inner hole of the fixed hanging rod, and the small-diameter end of the extension hanging rod body slides into the small-diameter hole of the stepped hole. The shoulder surface and the stepped surface of the stepped hole abut against each other to achieve a blocking function. The extension hanging rod of this application is short in length, the extension hanging rod body is integral, and the extension hanging rod has high strength and is not easily deformed.

The invention discloses a gate valve which comprises a valve body, an adjusting seat, a valve rod, a built-in nut and a gate plate unit. The valve body comprises a channel pipe and a fixed shell, the fixed shell is fixedly connected to the channel pipe in a sealed mode, and the channel pipe is provided with a channel and a communicating connecting hole. The adjusting seat is screwed in the fixed shell, the adjusting seat is provided with a through hole, and the through hole comprises a first hole section and a large hole part diameter and is provided with an outward step surface; the valve rod is provided with a convex shoulder, the valve rod can rotationally penetrate through the adjusting seat and is provided with an extending section, the convex shoulder is located in the through hole of the adjusting seat, and the inner shoulder surface of the convex shoulder is supported on the step surface; the built-in nut is in threaded connection with the large hole part of the adjusting seat and is in supporting connection with the outer shoulder surface of the convex shoulder; the gate plate unit is in threaded connection with the extending section of the valve rod, the valve rod rotates to drive the valve plate to slide inside and outside, and the channel is controlled through inside and outside sliding of the valve plate. The rotation stopping device has the advantages of being compact in structure, low in height, simple and firm in structure and good in rotation stopping effect.

Sealing device (5) for a rolling bearing (1) comprising an annular support (8) and an elastomeric element (9) integrally with the annular support;wherein a radially outer edge (10) of the elastomeric element is paired with an outer ring (2) of the rolling bearing, and a radially inner edge (11) of the elastomeric element is paired with a shoulder surface (15) of an annular sealing seat (13) of the inner ring (3) of the rolling bearing, with an annular sealing lip (20) which is substantially formed in the shape of a sleeve, projecting axially only from an end face (21) which faces the inside of the bearing (1) of a flange-shaped radial arm (16), which projects radially with respect to the annular support (8) from a root section (22) of the radially inner edge of the elastomeric element, which is provided with an axial overhang (24) which projects from the end face (21) along an axial extent which is approximately equal to that of the sleeve-shaped, annular lip (20) is;

The invention belongs to the technical field of oil drilling, and particularly relates to a drill rod thread structure with a stress reducing groove and a machining method. An external thread joint main shoulder surface, an external thread joint stress reducing groove, an external thread joint auxiliary shoulder surface and an external thread joint taper pipe thread are arranged on the external thread connection main body; one end of the internal thread connector body is connected with a drill rod, the other end of the internal thread connector body is a threaded connecting section, and an internal thread connector main shoulder face, an internal thread connector stress reducing groove, an internal thread connector auxiliary shoulder face and internal thread of an internal thread connector taper pipe are arranged on the internal thread connector body. The external thread of the external thread connector taper pipe and the internal thread of the internal thread connector taper pipe are connected in a matched mode to bear axial loads, and the main shoulder face of the external thread connector makes contact with the main shoulder face of the internal thread connector to bear torque during connection. The maximum stress of the drill rod thread during working can be reduced, and the service life of the drill rod thread is prolonged.

This utility model relates to the field of clothing technology and discloses a human shoulder curve adaptation mold for three-dimensional cutting of long-sleeved yoga wear. It includes a base and a slide rod fixedly installed at the top of the base. A top plate is fixedly installed at the end of the slide rod away from the base, and a hydraulic cylinder is fixedly installed on the side of the top plate away from the slide rod. An installation plate is fixedly installed at the movable end of the hydraulic cylinder. This human shoulder curve adaptation mold for three-dimensional cutting of long-sleeved yoga wear allows for quick installation of the upper mold through the cooperation of the guide block and guide groove, and bolt one, threaded hole two, and threaded hole one. It also allows for quick positioning of the lower mold through the cooperation of the lower mold and installation groove one, and positioning block and positioning groove. The design of bolt two, threaded hole four, and threaded hole three facilitates the installation of the lower mold. After prolonged use, it is easy to inspect or replace. The cooling component design allows for rapid cooling of the injection molding material during injection molding, accelerating the molding speed and increasing work efficiency.

The application belongs to the technical field of medical apparatuses, and discloses a shoulder treatment instrument electrode sheet arrangement method and a shoulder treatment instrument. The method comprises the following steps: determining the outermost bony point of the acromion as a coordinate origin point O point, establishing an X axis-Y axis-Z axis three-dimensional local coordinate system on the shoulder with the O point; setting at least one first angle reference line L1 and at least one second angle reference line L2 in the X-Y plane, and forming at least three treatment zones on the shoulder surface through the positive or negative direction of the angle reference line and the X axis; setting at least one electrode conductive area in each treatment zone; and pasting the electrode sheet on the shoulder so that the conductive part of the electrode sheet corresponds to the electrode conductive area. Therefore, through the method, the pasting of the electrode sheet by different operators has high consistency, and regional treatment is formed on the shoulder of the patient, so that the electrode sheet accurately corresponds to the affected area, improves the targeting and effect of treatment, and effectively plays the treatment effect of the treatment instrument on the painful part of the shoulder.

A compliant pivot joint is provided for rotationally coupling a link member to a frame member in a vehicle seat. The compliant pivot joint includes a cup-shaped protrusion having a cup opening formed on the link member, a shoulder bolt having a first shaft portion projecting from a bolt head and terminating at a shoulder, a bias member having a bias opening, and a fastener fixedly coupled to the frame member. The shoulder bolt is fixedly coupled to the fastener and extends through the bias opening and through the cup opening. The bias member is spaced between the cup-shaped protrusion and the bolt head and biases the bolt head away from the cup-shaped protrusion. A curved shoulder surface of the fastener is frictionally engaged with the cup-shaped protrusion and the shoulder of the shoulder bolt is frictionally engaged with an end surface of the fastener.